Probing dark sectors with long-lived particles at BELLE II

Probing dark sectors with long-lived particles at BELLE II

We propose a new search for light scalar singlets in rare meson decays. For tiny interactions, the scalar is long-lived at detector scales and decays into displaced pairs of leptons or light mesons. We show that Belle II has a remarkable potential to probe scalars in the GeV range with couplings as...

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Veröffentlicht in:arXiv.org 2020-06
Hauptverfasser: Filimonova, Anastasiia, Schäfer, Ruth, Westhoff, Susanne
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Couplings
Leptons
Mesons
Particle decay
Physics - High Energy Physics - Experiment
Physics - High Energy Physics - Phenomenology
Scalars
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Schäfer, Ruth
Westhoff, Susanne
description We propose a new search for light scalar singlets in rare meson decays. For tiny interactions, the scalar is long-lived at detector scales and decays into displaced pairs of leptons or light mesons. We show that Belle II has a remarkable potential to probe scalars in the GeV range with couplings as small as \(10^{-5}\). The predicted sensitivity is higher than at the long-baseline experiments FASER and NA62. We also investigate signatures of invisibly decaying scalars in rare meson decays with missing energy.
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subjects Couplings
Leptons
Mesons
Particle decay
Physics - High Energy Physics - Experiment
Physics - High Energy Physics - Phenomenology
Scalars
title Probing dark sectors with long-lived particles at BELLE II
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